<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
.column{
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.row{
  display: flex;
  flex-direction:row;
  justify-content: center;
}

.box01{
  background-color: pink;
  margin: 10px;
}

  .father{
    height: 500px;
    border:1px solid red;
    align-items: center;
    flex-wrap: wrap;
  }

  .box02{
    align-self: stretch;
  }

  .box03{
    flex: 1;
  }
</style>
<body>
  <div class="row father">
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01">段落1</p>
    <p class="box01 box02">段落1</p>
    <p class="box01 box03">段落1</p>
    <p class="box01 box03">段落1</p>
  </div>
</body>
</html>